Braga, who finished above Porto in the Portuguese league last season and knocked out Spain's Sevilla to reach the group stage of Europe's blue riband competition, were thrashed 6-0 by the rampant English team.
"We could not have played any worse," a shell-shocked Paciencia told reporters at the Emirates Stadium after an embarrassingly one-sided Group H opener.
"I wish we could have finished the game at half-time and even then it still would have been a bad experience.
"This was not the image we wanted to give of Braga. We've only lost three points but it was a night to forget."
"We can't play any worse than that," he said. "We know perfectly well we were playing against a top team and we'll have to use it as an experience. But let's not repeat it.
"We were just too nervous and gave them too much space."
